Wordpress plugin gives "400 bad response" when enabling WAF

Confirmation

[X] My issue isn't already found on the issue tracker.
[X] I have replicated my issue using the latest version of the plugin and it is still present.

WordPress version

6.1.1

Cloudflare-WordPress version

4.11.0

PHP version

8.2.4

Expected result

When I click on WAF to enable the settings in the Wordpress plugin, it enables or provides a reason on why it can't be enabled (or, if it can't be enabled due to a conflicting setting, it is not selectable).

Actual result

When I enable WAF, I get the error:

PHP message: [Cloudflare] ERROR: [CLIENT API] Array ( [type] => request [path] => https://api.cloudflare.com/client/v4/zones//settings/waf?action=cloudflare_proxy [timeout] => 30 [method] => PATCH [headers] => Array ( [Content-Type] => application/json [User-Agent] => wordpress/6.1.1; cloudflare-wordpress-plugin/4.11.0 [Authorization] => REDACTED )

[body] => {"value":"on"}

) ; PHP message: [Cloudflare] ERROR: [CLIENT API] Array ( [type] => response [reason] => Bad Request [code] => 400 )

Steps to reproduce

Install cloudflare plugin (I use APO, unsure if requirement)
Click settings
Scroll down to "Web Application Firewall"
Enable it
See error that just says "bad request" in the bottom of the page alert. Log shows:

PHP message: [Cloudflare] ERROR: [CLIENT API] Array
(
    [type] => request
    [path] => https://api.cloudflare.com/client/v4/zones/<zone id>/settings/waf?action=cloudflare_proxy
    [timeout] => 30
    [method] => PATCH
    [headers] => Array
        (
            [Content-Type] => application/json
            [User-Agent] => wordpress/6.1.1; cloudflare-wordpress-plugin/4.11.0
            [Authorization] => REDACTED
        )

    [body] => {"value":"on"}
)
 ; PHP message: [Cloudflare] ERROR: [CLIENT API] Array
(
    [type] => response
    [reason] => Bad Request
    [code] => 400
)
 ; PHP message: [Cloudflare] ERROR: Bad Request" while reading response header from upstream, client: 2601:x:x:x::x, server: www.example.com, request: "PATCH /wp-admin/admin-ajax.php?action=cloudflare_proxy HTTP/2.0", upstream: "fastcgi://unix:/var/run/php-fcgi.pid:", host: "www.example.com", referrer: "https://www.example.com/wp-admin/options-general.php?page=cloudflare"

Additional factoids

No response

References

The following seem to have similar error messages. Unsure if same cause: https://github.com/cloudflare/Cloudflare-WordPress/issues/506 https://github.com/cloudflare/Cloudflare-WordPress/issues/481

cloudflare / Cloudflare-WordPress